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Suzanne Tucker/Shutters... ...classified as such when their body mass index or BMI reaches a certain value. BMI , a formula based on a person's weight and height,... ...in age and country-by-country variations. Indeed, BMI is a good statistical measure of t...

From the department of obvious research, an unscientific online poll by the Guardian finds that men are four times more likely than women to underestimate how overweight they are.More than 300,000 people fed their height...